As a seasoned amateur baseball umpire, I'll let you know MLB rules are confusing at best and can contradict each other as well. Umpires rely on rules interpretations, and even then there can be disagreements.
Please don't get your rules information from TV announcers, Tim McCarver has gotten many more wrong than the umpires (Which was a tough feat this year). And there are a number of rules myths which have been carried down from generation to generation and propagated by coaches and announcers which are just plain false.
Also, don't forget college, high school, Little League, and other groups have their own rules set which may differ from MLB.
I'll be glad to answer your rules questions. If you have a rules question please cite which rules set you are referring to.
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